DitDah Decoder - Morse Code CW

Decode Morse code (CW) in real time, send it back, and log your ham radio QSOs.

DitDah Decoder is a professional-grade Morse code communication tool designed for amateur radio operators and CW enthusiasts. It decodes Morse code from audio in real time and lets you send messages back.

Decode Morse Code
- Real-time audio decoding from your microphone, or use an external adapter to receive directly from your radio
- Probabilistic decoding engine that handles weak signals, fading (QSB), and real-world timing
- Automatic gain and threshold: the default settings work best, with no manual tuning needed
- Q-code and abbreviation translation
- Saves audio recordings of your decoding sessions
- Autocorrect button for reprocessing saved audio with neural networks

Send Morse Code
- Type messages and transmit them as Morse code audio
- Adjustable frequency and speed (WPM)
- Repeat send mode for calling CQ
- Use an external adapter to transmit directly through your radio
- Two people using the app can easily send messages back and forth on the air

Complete Logbook
- Automatic call sign detection with country lookup
- Organized by date and call sign
- Tap any call sign to see stats
- QSO tracking and confirmation
- ADIF export

Private by design: decoding runs entirely on your device. No account, no ads, and no data leaves your phone.

Whether you're a licensed amateur radio operator working CW on the bands or learning Morse code, DitDah Decoder gives you the tools for two-way Morse communication.